Optimal control of the strong-field ionization of silver clusters in helium droplets
2010
Optimal control techniques combined with femtosecond laser pulse shaping are applied to steer and enhance the strong-field induced emission of highly charged atomic ions from silver clusters embedded in helium nanodroplets. With
light fieldsshaped in amplitude and phase we observe a substantial increase of the Ag{sup q+} yield for q>10 when compared to bandwidth-limited and optimally stretched pulses. A remarkably simple double-pulse structure, containing a low-intensity prepulse and a stronger main pulse, turns out to produce the highest atomic charge states up to Ag{sup 20+}. A negative chirp during the main pulse hints at dynamic frequency locking to the cluster plasmon. A numerical optimal control study on pure silver clusters with a nanoplasma model converges to a similar pulse structure and corroborates that the optimal
light fieldadapts to the resonant excitation of cluster surface plasmons for efficient ionization.
Keywords:
-
Correction
-
Source
-
Cite
-
Save
-
Machine Reading By IdeaReader
36
References
19
Citations
NaN
KQI